"One country, two systems" safeguards Hong Kong prosperity, stability: top legislator

State Councilor Yang Jiechi(1st L) addresses the opening ceremony of an exhibition profiling the achievements in Hong Kong since its return to the motherland in 1997, at the National Museum in Beijing, capital of China, June 26, 2017. Zhang Dejiang, chairman of the Standing Committee of the National People's Congress, and a member of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee, attended the opening ceremony. (Xinhua/Li Xueren)